SBR value proposition.

One of your clients use free radius to fulfill their access and accounting needs for their PPPoE and PPPoA customers. I however would like to pitch them the Juniper SBR to enhance their network architecture, as they are already using Juniper MX-960 as BNG and Core router. I only have access to SBR datasheet and Administration documentation.

Is there anyone who can guide me how to better prepare for this. I have no selling guides.